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Fibonacci Sequence

★★☆☆☆Middle School

📖Definition

The Fibonacci sequence is where each term is the sum of the two preceding terms. F(1)=1, F(2)=1, F(n)=F(n-1)+F(n-2).

📐Formulas

Fₙ = F_n-1 + F_n-2

Fibonacci recurrence

Fₙ = (φⁿ - ψⁿ)/(√5)

Binet's formula (φ = golden ratio)

lim_n → ∈fty \fracF_n+1Fₙ = φ = \frac1+√52

Convergence to golden ratio

✏️Examples

예제 1

List the first 10 Fibonacci numbers.

📜History

Discovered by: Leonardo Fibonacci (1202)

Fibonacci introduced this sequence while explaining rabbit breeding.

Applications

Nature

Sunflower seeds, shell spirals

Finance

Fibonacci retracement

Algorithms

Fibonacci heap, DP example

🔗Related Documents

Prerequisites

#피보나치#수열#Fibonacci#sequence